2566568664 has 48 divisors (see below), whose sum is σ = 7583046120. Its totient is φ = 777747840.

The previous prime is 2566568633. The next prime is 2566568723. The reversal of 2566568664 is 4668656652.

It is a self number, because there is not a number n which added to its sum of digits gives 2566568664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1619517 + ... + 1621100.

Almost surely, 2^2566568664 is an apocalyptic number.

2566568664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2566568664 is an abundant number, since it is smaller than the sum of its proper divisors (5016477456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2566568664 is a wasteful number, since it uses less digits than its factorization.

2566568664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240640 (or 3240633 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 54.

The square root of 2566568664 is about 50661.3132873596. The cubic root of 2566568664 is about 1369.1497848644.

The spelling of 2566568664 in words is "two billion, five hundred sixty-six million, five hundred sixty-eight thousand, six hundred sixty-four".